Lake Zoar Authority | Water Quality Monitoring
The Lake Zoar Authority is a multi-town organization consisting of representatives from the four towns that border the lake - Monroe, Newtown, Oxford, and Southbury. The Lake Zoar Authority is tasked with the goals of improving water quality and promoting safe boating on the lake.
Lake Zoar Authority, Lake Zoar, CT, Connecticut, Newtown, Southbury, Oxford, Monroe
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Water Quality Monitoring

Water quality is a primary area of focus for the Lake Zoar Authority. Beginning in 2020, Western Connecticut State University’s Cyanobacteria Monitoring Program includes Lake Zoar in a weekly water testing program. The annual program monitors Cyanobacteria in regional lakes during the summer months when blooms are most likely. When Microcystin toxin levels exceeded federal and state limits, public beaches are closed. The towns and DEEP also test water at public beaches.

 

The LZA’s role is information gathering. The LZA also participates in water studies to learn more about the changing conditions of the water. In addition to quality, the LZA has an extensive program to control the growth of invasive weeds and as funds allow the most infested areas are treated with an herbicide that is used in over 150 lakes in CT each year.

 

Submitted herein are test results and survey reports for public interest.

 

For additional information, please visit:

CT DEEP Lake and Pond Water Quality Monitoring Program

CT DEEP Lake Water Quality Management

WCSU Environmental Research Project

SOLitude Lake Management

FirstLight Power

 

Local Health Departments:

Monroe

Newtown

Oxford & Southbury

 

  • Microcystin Report for
    July 7, 2021

      “Here are this week’s assay results for Microcystin levels at tested public beach sites. Samples were collected July 7, 2021. Results meet the assay kit’s QC criteria.   The U.S. EPA and CT DPH currently advise a Microcystin threshold of 8.0 parts per billion (ppb; µg/L) for recreational......

  • Microcystin Report for
    June 30, 2021

      “Here are this week’s assay results for Microcystin levels at tested public beach sites. Samples were collected June 30, 2021. Results meet the assay kit’s QC criteria.   The U.S. EPA and CT DPH currently advise a Microcystin threshold of 8.0 parts per billion (ppb; µg/L) for recreational......

  • Lake Zoar Treatment Notice:
    Herbicide Application
    Rescheduled: 8/4/21

    THE JULY 2021 TREATMENT WAS CONTINUOUSLY CANCELLED DUE TO EXCEEDINGLY HIGH WATER LEVELS. THE TREATMENT WILL NOW BE CONDUCTED ON WEDNESDAY 8/4/21. NOTIFICATION OF AQUATIC TREATMENT SCHEDULING LAKE ZOAR MONROE, NEWTOWN, OXFORD, SOUTHBURY Updated 7/29/2021 6:23 PM – In accordance with CT DEEP, Pesticide Division......

  • 2020 Aquatic Plant Survey Results

    “Survey Dates: The pre-treatment survey of Lake Zoar was conducted on June 18th. A second survey was conducted on July 27th, after the first herbicide treatment and prior to the second. The final survey was conducted on October 1st, following the second herbicide treatment.   ......

  • FINAL 2020
    Microcystin toxin report
    for September 2, 2020

      “From: Ghada Hafez<hafezg@wcsu.edu> Date: Fri, Sep 4, 2020 at 10:02 AM Subject: Final microcystin toxin report for Sep 02, 2020 To: lakezoar@gmail.com <lakezoar@gmail.com   Here are the final week’s assay results for Microcystin levels at tested public beach sites. Samples were collected Sept  02, 2020, below or away......

  • Microcystin toxin report
    for August 26, 2020

      “Here are this week’s assay results for Microcystin levels at tested public beach sites. Samples were collected August 26, 2020, below or away from any floating bloom material. Results meet the assay kit’s QC criteria.   The U.S. EPA and CT DPH currently advise a Microcystin threshold of......

  • Microcystin toxin report
    for August 19, 2020

      “Here are this week’s assay results for Microcystin levels at tested public beach sites. Samples were collected August 19, 2020, below or away from any floating bloom material. Results meet the assay kit’s QC criteria. – The U.S. EPA and CT DPH currently advise a Microcystin......

  • TOWN HALL POSTING:
    NOTIFICATION OF AQUATIC TREATMENT
    RE-SCHEDULING

    LAKE ZOAR – MONROE, NEWTOWN, OXFORD, SOUTHBURY TOWN HALL POSTING In accordance with CT DEEP, Pesticide Division notification requirements, selected areas of Lake Zoar will be chemically treated with Reward (Diquat) herbicide targeting control the aquatic nuisance plants Eurasian watermilfoil and curlyleaf pondweed.  The treatment......

  • Second Herbicide Treatment
    Rescheduled
    to Wednesday, 8-26-20

    UPDATE: The August 2020 herbicide treatment has been rescheduled to Wednesday, August 26, 2020, weather permitting.   NOTIFICATION OF AQUATIC TREATMENT SCHEDULING LAKE ZOAR MONROE, NEWTOWN, OXFORD, SOUTHBURY In accordance with CT DEEP, Pesticide Division notification requirements, selected areas of Lake Zoar will be chemically......

  • Microcystin toxin report
    for August 13, 2020

    “Here are this week’s assay results for Microcystin levels at tested public beach sites. Samples were collected August 13, 2020, below or away from any floating bloom material. Results meet the assay kit’s QC criteria.   The U.S. EPA and CT DPH currently advise a Microcystin threshold of 8.0......

  • Lake Zoar Treatment Notice:
    Second Herbicide Application
    Scheduled for 8-19-20

    NOTIFICATION OF AQUATIC TREATMENT SCHEDULING LAKE ZOAR MONROE, NEWTOWN, OXFORD, SOUTHBURY In accordance with CT DEEP, Pesticide Division notification requirements, selected areas of Lake Zoar will be chemically treated with Reward (Diquat) herbicide, targeting control the aquatic nuisance plants Eurasian watermilfoil and curlyleaf pondweed. The......

  • Microcystin toxin report
    for August 5, 2020

    Here are the Microcystin toxin report for samples collected Aug 5, 2020. *Jackson Cove beach was not able to be accessed due to fallen trees and power lines.   “Microcystin Report Samples collected August 5, 2020   Site     ppb (ug/L) Beseck   0.516 Brookfield   0.314 Danbury   0.341......